Finish to implement
================
* Remove multiple SSH key => [in review](
http://gerrit.tuleap.net/#/c/2104/)
* Delete plugin => [in review](
http://gerrit.tuleap.net/#/c/2107/)
To test (and fix if necessary)
======================
* Content of repo are migrated => functionnaly OK
* Replication
* Included groups => functionnaly OK
* Parent of parent of parent project
* READ ONLY
* Remove all project Members
Technical debt
============
* Exception CommandFailure
* remove isLastRequestSuccess
* Replace cURL by Guzzle (bonus)